Bulk Material Locks

The task of the bulk material lock in a pressure conveying system is to introduce a predetermined solid mass flow against the conveying line overpressure into the conveying gas stream/transport line while sealing the system overpressure against the environment or the upstream system components, i.e., keeping the gas leakage across the feeder as low as possible. In suction systems, the lock must realize the discharge of the solid separated from the conveying gas at the end of the conveying distance from the system’s underpressure to the ambient pressure while avoiding the penetration of leakage gas. Compare this to Fig. 1.2.